Abstract
The paper reports on the results of a comparative study of the adhesive strength of coatings made of unfilled epoxy lacquer and lacquers filled with nanosized TiO2, SiO2, and ZnO oxides, which have been obtained in scratch testing experiments. The coatings are applied onto an aluminum-magnesium alloy base. The value of specific elastic energy per unit area of the cohesion boundary is used as the measure of adhesion. Scratch testing is performed with conical Rockwell indenters on an attachment to a Zwick 2.5 testing machine. The coating modified with silicon dioxide proves to have the highest resistance to adhesive failure under local action among all the studied coatings based on epoxy lacquer.
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